I've been told one of the ports on my pc is open, Or something like that, Which means people can hack me easily? How do i close this and whats the best firewall, Anyone who can get my pc completly protected from hackers PLEASE HELP! Thanks To all that help...

If your just on a dial up and not networked(not AOL because what I mention here wont work I think) you should be able to just delete all networking clients and protocols and you should be pretty much safe without a firewall.Below is a link that explains this.